Between 1970 and 2005, China's GDP per capita grew at an average rate of 7.3% per year while GDP per capita in the US grew at an average rate of 2.2%. In 2005, US GDP per capita was $36,806 and Chinese GDP per capita was $5,955. Assuming that the two countries continue to grow at these rates, in what year will China overtake the US in terms of GDP per capita?